# -*- coding: utf-8 -*-
# tcp socket

import socket
import threading
import time
import io
import sys
# sys.stdout = io.TextIOWrapper(sys.stdout.buffer,encoding='utf-8')

########### 客户端编程
# 创建一个socket;
# AF_INET ---> IPv4协议 AF_INET6 ---> IPv6
# SOCK_STREAM指定使用面向流的TCP协议
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)

# 建立连接；
s.connect(('www.sina.com.cn',80))

# 发送数据:
s.send(b'GET / HTTP/1.1\r\nHost: www.sina.com.cn\r\nConnection: close\r\n\r\n')

# 接收数据
buffer=[]
while True:
	#每次最多接收1k字节
	d = s.recv(1024)
	if d:
		buffer.append(d)
	else:
		break
data = b''.join(buffer)

print(data)

header,html = data.split(b'\r\n\r\n', 1)
print(header.decode('utf-8'))

# 把接收的数据写入文件
with open('sina.html','wb') as f:
	f.write(html)

# 关闭连接
s.close()



########### 服务端编程
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# 绑定端口
s.bind(('127.0.0.1',9999))

# 开始监听，参数表示最大连接数量
s.listen(5)
print('Waiting for connection...')

def tcplink(sock,addr):
	print('Accept new connection from %s:%s' % addr)
	sock.send(b'Welcome')
	while True:
		data = sock.recv(1024)
		time.sleep(1)
		if not data or data.decode('utf-8') =='exit':
			break
		sock.send(('Hello,%s!' % data.decode('utf-8')).encode('utf-8'))
	sock.close()
	print('Connection from %s:%s closed.' % addr)

while True:
	# 接受一个新连接
	sock,addr=s.accept()
	# 创建新线程来处理TCP连接
	t = threading.Thread(target=tcplink,args=(sock,addr))
	t.start()